fix: on teardown, use the last known value for the signal before the se

Author: trueadm

packages/svelte/src/internal/client/reactivity/sources.js

@@ -34,7 +34,6 @@ import * as e from '../errors.js';
 import { legacy_mode_flag, tracing_mode_flag } from '../../flags/index.js';
 import { get_stack } from '../dev/tracing.js';
 import { component_context, is_runes } from '../context.js';
-import { queue_micro_task } from '../dom/task.js';
 
 export let inspect_effects = new Set();